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United States Patent | 5,207,813 |
Danzuka ,   et al. | May 4, 1993 |
A glass article is produced at a high production rate and a high yield by jetting a glass-forming raw material from a multi-port burner, synthesizing glass soot through hydrolysis of the glass-forming raw material, depositing the glass soot to form a soot preform and heating and vitrifying the soot preform to produce a transparent glass article, wherein the glass-forming raw material is vaporized by heating it at a temperature higher than its boiling point and directly supplied to the burner, the vaporized glass-forming raw material and a fuel gas for synthesizing glass soot are supplied to an inner port of the multi-port burner and a fuel gas for heating a formed preform is supplied to an outer port of the multi-port burner, and a molar ratio of water generated by a reaction of the fuel gas for synthesizing glass soot to the glass-foring raw material is from to 2 to 3.
Inventors: | Danzuka; Toshio (Yokohama, JP); Ito; Masumi (Yokohama, JP); Takagi; Masahiro (Yokohama, JP); Yokota; Hiroshi (Yokohama, JP) |
Assignee: | Sumitomo Electric Industries, Ltd. (JP) |
Appl. No.: | 754470 |
Filed: | September 4, 1991 |
Sep 07, 1990[JP] | 2-238507 |
Current U.S. Class: | 65/414; 65/60.5 |
Intern'l Class: | C03B 037/018 |
Field of Search: | 65/3.12,18.2,60.8,60.5 |
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4781740 | Nov., 1988 | Danzuka et al. | 65/3. |
4826520 | May., 1989 | Kawazoe et al. | 65/3. |
4915716 | Apr., 1990 | Monroe et al. | 65/3. |
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